Carbureter.



` YPatented oct. 2 5, 1910.

lull lalimii NIII cAnBuRBTEn APPLIUATIOE FILED .111.129, 1909.

OE KOKOMO, INDIAN.

rammed oet. 25, 1910.

Serial No. 474,929.

FRANK L. KINGSTON,

CRBURETER.

974.076. Specification of Letters Patent.

Application filed January 29, 1909.

To-all whom it may concern:

. motor ,upon

` Be it known that l, FRANK L. Kincs'rms,

a citizenof the United States of Killer-iva.. and a resident of Kokomo, county of How-- ard, and State of Indiana, have invented a new and useful Improvement' in Carini-- reters, of which the following is a sijieeitication.

My invention has for its object the mal:- ing of a carbureter for internal combustion engines, which will supply to the engine a proper mixture at all engine speeds, and which will at the same time be eeonfmiical as to the use of gasolene, or other fuel.

adapting itself automatically to the various running conditions of Vthe engine, have minimum number of manual adjustments, and those of a most simple character, and be of such simple construction as -to malte it easy to manufacture and take care of.

A further and more specific object is to provide for the automatic priming of the starting, and also the ta king in of the air in such a manner that it will on its entrance be afforded an opportunity for mixing with the fuel. y

On the .sheet of drawings which :\c' ou'1`.

pames this specification and forms a. part thereof, Figure 1 is a vertical sectional view' of my carbureter'and Fig.- 2 is a horizontal. sectional view` the section being taken on the line 2-, with the part 1 removed.

The parts 1-2-3- form the body of the main frame work of my carbureter. These parts arepreferably of cast brass, although, of course, they may be made in any other suitable way.

Part 1 is provided with an internal screw thread opening 4, for facilitating its attachment to theintake pipe of theengine. \Vith-.

in the neck, or tube,

leading'from the intake pipe' of the engine thereis a throttle valve ,5, which I preferably make in the general form of a stove pipe plate is secured 1, and carriesl 'at itsouter end a lever 7 for thel attachment of the throttle 'valve-` rod, vby which the throttle .is manually controlled by theoperator of the engine. Mounted also upon the shaftl there is a lever turns with the' shaft.' This lever 8 is L- 'shapednd its two outer ends serve to endamper. This damper toa shaft 6 within the part 8 which from the part l insuch manner as to limit the movement of the shaft, and its valvefplate, to approximately a 90 degree movement. By changing the angular position of the operating lever 7 with respect to the stop lever 8 ou the shaft. 6, the lever 7 is .readily adapted to receive its operating push or. pull from any direction at right angles with the shaft 6.

The part 2 forms the float Ycln'mnber of the carbureter, and it engages the part l by the screw threads, as clearly indicated.' The float chamberv 10 is annular'in form and within it is mounted the 'float 11, which may be of cork, wood or hollow metal, or any gravity than the liquid fuel to be used. This float, is mounted by a bolt 12, or bolts, upon a lever' 13, which lever is pivoted on a intake chamber 15,

lever 1 3 there' is carried a which serves to close or open the passage 17 through which the vliquid fuelis supplied; The valve 16 is mounted on a light vertical rod of brass provided with largement, which engages loosely within a seat on the lever 13, and'isheld in place by a hollow nut 19, as shown. vBy this'eon-V struction there is provided a'flexible mount` ingI for the valve 16, allowing it to seat itself naturally whendepressed. A slot in the upper end 0f.- the valve rod is. provided to enable the'turning of the valve in its seat in case it is necessary to clean or re-seatit. Access to this valve is provided for by means of the screw cap 20, which closes the upper part of the fuel intake chamber.

Gasolene, or other fuel, .is supplied to the earbureter through, the passage 17, suitable pipes terminating in to the fuel tank or reservoir. gasolene Within` the predetermined level the float 11 is raised, ing olf the supply of more fuel. drawal. of the fuel froml allows the cone valve to open slightly, admitting more fuel. In this way the level. of the .gasolene within the float chamber is maintained atan approximately lixed position.

The part is provided with an internal other suitable substance of smaller -specific transverse rod 14 extending across a fuel= which is offsetj'from the' iioat chamber' `10. On the-outer end-'of the cone-valve 16,

aspherical en the coupling A21 leading i i As soon as. the 4 float chamber reaches a thus . shaped spray nozzle 27.

screw'thread Hang'e 22', the scfrew thread on which en ages an external screw thread poi'- tion of tlepait l. As the float cliaiiibei part 2-lies between the lateral flange 23 projecting from the-part 1, and the lateral flange 24 rejecting from the part 3, the float cham' rpart is securely clamped in place between these two flanges when the screw thread portion 22 of the part 3 is screwed home on the part.1. In order to prevent a fuel leakage a gasket 25, preferably of tubular copper, is provided between the Bange 24 and the lower part'of the float chamber. Carried upon a tubular transversemember 26 of the part 3 is a cup- This engages the transverse tube 26 b means of a screw thread, as shown, an is therefore, readily removable for cleanin or renewal. This spray nozzle has an en arged opening-cup l2 8-at its upper lend which openingcommunicates through the needle valve passage 29 with the assage 30 of the transverse member 26. passage for the fuel from the floatchamber 10 to the cu 28 of the spray nozzle, and the gasolene whil therefore rise in this cup to the samelevel as in the float chamber. The

jpassage 29 maybe closed to a greater or less sage, an

extent b the needle valve 31J which is screw threade as sliown, and provided with a stuiling 'gland 32,4 which may be packed to prevent the leakage of fuel. A suitable .thumb 'screw 33 provides read'- means for adjustin --the needle valve wit in the 'pasthus regulating the normal flow of .fuel through the spray nozzle.

Surrounding the stem of the needle valve Ell-.there is an annular passage 34 which forms thenormal air intake; air is thus taken in from the bottom of the carbureter and leads up through the passage 34 around the spray nozzle 27. The passage 34 is con stricted so-as to' form a strangling nozzle 35 juston a level withI t-he upper edge of.

the s ray nozzle. By this means the air as 1t is rawn in through the carbureter rushes by the spray nozzle Withmaximum 'velocity and mixes perfectly with the fuel vapor that is being drawn up through that nozzle.

Surrounding the passage 34 there is a passage 36, through which a1r may be admitted from below the carbureter through the auxiliary passages 37. These auxiliary assages are normally'closed by means of all va ves 38 resting against 4the seats 39, being v held therein'by gravity. The ball seats' 39 vso are brass or bronze, and are screw threaded to the opening on the lowerpart of the castin 3, as indicated. .I preferably nia-k the ba s 38 of bronze, and make them all of the Same -size and weight, and makev the pas! saaes 37 of different diameters, so that the b s will be operated successively as the enherevis thus afforded a free' -engine speed increases, thus adjusting the supply of air automatically to the engine speed at all times.

The passage 36, like the passage 34, entirely surrounds the fuel nozzle, and is con* st'ricted at a point just above the fuel nozzle so that the vair coming in through the auxiliary passages will unite more completely with the va 'or, or spray, emerging from the spray nozz e. needle valve aliords a reservoir for a small amount of asolene during the period ot' idlenessvof t e engine, and the first suction stroke of the engine on crankin throwsfthe accumulated gasolene out oft is priming cup and allows -it to, mix freely with the incoming air, thus giving an initialcharge of sulicient richness t0 cause the first. explosion with certainty; the effect produced being practically the same as though when the motor is riiried by some external means.

At 40 show a plunger which may be depressed by the lever 41 so as to push the float 11 down and thus raise the cone valve 1G. By this operation gasolene ,is allowed to enter the float chamber 'above its usual level, and thus flood the carburetor when it is desired todo so.

In the construction above shown, all diflicult manufacturing operations are. avoided, and each part of the carbureteris accessible for inspection,-cleaning or repairs.

The feature of bringing both-the normal air su ply and the auxiliary air supply through) passages thatf'surround the spray nozzle, and of providing a strangling nozzle for each of these air sup lies at 'the point where the air meets the nel Ivapor secures '5.

a most complete mixing of the air and vapor in the most direcI-possible manner and with the least complication. The directness with which this result is secured is made possible by the placing of both the normal and the auxiliary air intakes at the bottom of the carbureter.

employing balls of uniform size, rel B gardless of the areas `of the openings which they cover, and b employin valve seats that are bodily an individual y removable, I attain several distinct advantages of construction and operation'. The unifoririity in -ball sizes allows eorrespo'iidinur uniformity in the curvature of all the bal seats. This vtends toward economy in construction, since the same tools which forinand grind the ball valveseats may be employed for all seats, regardless of the size of the cylindrical opening which is covered by the ball. The ball seats may therefore all be made exactly alike and the opening through. them altered as desiredlby the very simple process of The cup -28 just above the drilling. The uniformity in the. size of the balls is also of advantage in the assembly of the carbureter in the factor and also in the ease of repairs on the roads,7 particularly the latter. since the motorist need carry but a single size of balls in his repair` kit rather"4 than a graded size. of balls as is the case where balls ot' variant sizes are employed.

By the concentric form of the normal and high speed air passages, the rich mixture of earbureted air through the normal air pas. sage retains to a considerable extent its ey` lindrieal form and is surrounded by a concentric envelop of unmixed air from the high speed air passage as it passes upward through the opening 4. An advantage of the arrangement of parts securing this condition is that the gasolene va or does not` condense upon the inner sur aces of the walls of lthe pipe leavin the carbureter, be-

cause the yapor itself 1s heldV insulatedin the center if Ithe pipe and does not touch -the walls-until after ith-as proceeded so far as to fnl the walls warmed by the engine and therefore not producing condensation. 'An

advaiitage of the. cylindrical form of part'3,',

and of the positioning of all the air intake openings and passages 34--37-37 wit-hin the cylindrical space of that part and u on the circular space forming-the lower. enc of that part is found in the convenience of attachment to the cylindrical part 3 of an air intake tube which may be carried to a suit. able source of air for feeding the carbureter. In automobile work the earbureter is located in arather dusty osition, and this intake.. tube may be carrie under the seatA or higher in the car if desired, to be above the dust of `the road. In stationary engines the advantage of the intake pipe su plying thus boththe normal and high speer air passages and being attached to the earbureter in so simplea manner is easily understood;

Itis obvious that certain changes may be made in the details of my carburetor Without departing from the spirit of my invention; but

l/Vhat I claim as new and desire to secure by United States Letters Patent is:l

' l. In a carbureter, a spray nozzle, a passage surroundmg said spray nozzle for the .normal admission of air, a passage surrounding said normal air passage for the admission of air at high engine speeds, a series of valves for admitting air into said high speed passa e, each of said valves consisting of an in ividually removable valve seat having an openingr therethrough, and a ball for normally closing said opening, Substantially as described.

2.' In a' carbureter, a spray nozzle, apas- 'sa e surrounding said sara nozzle for the normal admission of air, a passage surrounding said normal air passage orthe admission of air at high lengine speeds, a series of valves for admitting air into said high speed passage', each of said valves consisting of an individually removable valve 'seat having an opening therefor, anda ball for normally closing said opening, the balls of all of said valves being uniform in size and weight.

3. In-'a carbureter, an auxiliary passagefor the admission of air at high engine' speeds, a series of valves for the admission of air into said auxiliary passage, said valves being provided Awith individually removable seats having openings therethrou h vfor the admission or air and with balls or non mally closing said openings.

FRANK L. KINGSTON.

- Witnesses:

HARRIT L. SMITH, WM. KEMP.

ined by me at Chicago county of Cook 

